Certificates are free?

certificates are free?
What is an academic pledge?( writen in Certificate)

Everything is free. The academic honesty pledge is just what it says:

By clicking below, you pledge that all of your submitted code A) is code you or your pair personally wrote, or B) comes from open source libraries like jQuery, or C) has been clearly attributed to its original authors. You also give us permission to audit your challenge solutions and revoke your certificate if we discover evidence of plagiarism.

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and in the certificate it will be possible to enter real information about yourself last name first name?

It will use the name on your associated GitHub account.

thanks for the info.

Does it really free?